It seems that 1054 wasn't such a big deal: forty years later Pope Urban and Emperor Alexios were on such good terms that a crusade was initiated to save Constantinople and the Holy Lands; even in 1136 Pope Innocent II called upon Emperors Comnenus and Lothair to unite against Roger of Sicily.
This doesn't seem much of a schism. Only after the Massacre of the Latins and even more so the sack of Constantinople that the two sides broke terms completely and irreversible bitterness entered the social psyche.
The Pope and Patriarch were already disagreeing on points of religion from Carolingian times, and 1054 was simply the latest mutual excommunication before the fourth crusade.
Is this a correct assessment?